EP3394426B1 - Procédés pour monter ou démonter des éléments d'éolienne d'une éolienne à rotors multiples - Google Patents

Procédés pour monter ou démonter des éléments d'éolienne d'une éolienne à rotors multiples Download PDF

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Publication number
EP3394426B1
EP3394426B1 EP16819813.3A EP16819813A EP3394426B1 EP 3394426 B1 EP3394426 B1 EP 3394426B1 EP 16819813 A EP16819813 A EP 16819813A EP 3394426 B1 EP3394426 B1 EP 3394426B1
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EP
European Patent Office
Prior art keywords
load carrying
wind turbine
carrying structure
tower
positioning
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP16819813.3A
Other languages
German (de)
English (en)
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EP3394426A1 (fr
Inventor
Torben Ladegaard Baun
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vestas Wind Systems AS
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Vestas Wind Systems AS
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Publication date
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Publication of EP3394426A1 publication Critical patent/EP3394426A1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/02—Wind motors with rotation axis substantially parallel to the air flow entering the rotor  having a plurality of rotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/10—Assembly of wind motors; Arrangements for erecting wind motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2230/00—Manufacture
    • F05B2230/60—Assembly methods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2230/00—Manufacture
    • F05B2230/60—Assembly methods
    • F05B2230/61—Assembly methods using auxiliary equipment for lifting or holding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2230/00—Manufacture
    • F05B2230/70—Disassembly methods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/90—Mounting on supporting structures or systems
    • F05B2240/91—Mounting on supporting structures or systems on a stationary structure
    • F05B2240/916—Mounting on supporting structures or systems on a stationary structure with provision for hoisting onto the structure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/90—Mounting on supporting structures or systems
    • F05B2240/91—Mounting on supporting structures or systems on a stationary structure
    • F05B2240/917—Mounting on supporting structures or systems on a stationary structure attached to cables
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/728—Onshore wind turbines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present invention relates to a method of mounting or dismounting wind turbine components of energy generating units in a multirotor wind turbine.
  • the multirotor wind turbine comprises a tower configured to support one or more load carrying structures arranged for supporting at least two energy generating units positioned at the ends of the load carrying structure and at opposite sides of the tower.
  • Wind turbines normally comprise one or more energy generating units, each unit comprising a nacelle, a rotor with a number of wind turbine blades, and other wind turbine components such as a generator, gear arrangement, drive train, heat exchangers etc.
  • the wind acts on the wind turbine blades, thereby causing the rotor to rotate.
  • the rotational movements of the rotor are transferred to a generator, either via a gear arrangement or directly, in the case that the wind turbine is of a so-called direct drive type.
  • electrical energy is generated, which may be supplied to a power grid.
  • Some wind turbines are provided with two or more energy generating units in order to increase the total power produced by the wind turbine, without having to provide the wind turbine with one very large, and therefore heavy, rotor. Such wind turbines are sometimes referred to as 'multirotor wind turbines'.
  • the energy generating units may be carried by a load carrying structure which is, in turn, connected to a tower structure. Thereby at least some of the energy generating units are not mounted directly on the tower structure, and they may have a centre of gravity which is displaced with respect to a longitudinal axis defined by the tower structure. In general, the larger the rotor diameters, the further off the rotors are displaced with respect to the tower axis.
  • thrust forces will be created, which will in turn cause loads to be introduced in the load carrying structure, and possibly at connection points between the load carrying structure and the tower structure.
  • the energy generating units are arranged symmetrically around the tower axis, as the weight of the units would otherwise impose undesirable very large bending moments in the tower.
  • Prior art document GB 2,443,886 discloses a wind turbine arrangement comprising a tower and at least two arms projecting outwards there from.
  • a wind turbine is attached to an end of each arm, with means being provided to selectively lower each turbine towards the base of the tower to allow for easier maintenance.
  • the arms may be rigid with one another and pivoted to the tower such that each turbine can be lowered in turn.
  • the arms may be independent from one another and as such may both be lowered at the same time.
  • the turbines may also be lowered whilst the arms remain in a substantially horizontal position.
  • DE 10 2012 020052 discloses a turbine having a tower which is fixed to an internal bearing portion and an outer ring.
  • the outer ring is provided in opposite sides of the extension arms that are articulated at the end portion of a nacelle that is attached with a rotor. Height adjustment of the rotors is performed by vertical pivoting of the extension arms.
  • CN 101 446 270 discloses a wind generator system which comprises a tower, a generator assembly which is arranged on the tower, a transmission shaft which is connected with the generator assembly, and multi-stage wind wheels which are movably arranged and spaced along the axial direction of the transmission shaft.
  • the multi-stage wind wheels with small blades are arranged on the same shaft to replace a single wind wheel with huge blades, thus overcoming various disadvantages which are caused by huge blades of the existing huge wind generator, enhancing wind energy utilization efficiency, and universality and economical efficiency of the application of the wind electric power generation.
  • the invention provides a method according to claim 1.
  • the method according to the first aspect of the invention is for mounting or dismounting wind turbine components of energy generating units in a multirotor wind turbine. I.e. for example mounting a component during erecting of the wind turbine or dismounting or replacing a component during repair or servicing.
  • the mounting or dismounting includes positioning or dispositioning (i.e. removing completely or in part) the wind turbine components.
  • the term 'multirotor wind turbine' should be interpreted to mean a wind turbine comprising two or more rotors or energy generating units mounted on one tower structure.
  • the load carrying structure is arranged for supporting two or more energy generating units, and for being connected to a tower of the multirotor wind turbine. Accordingly, the load carrying structure forms a connection between the two or more energy generating units and the tower structure, and is capable of handling the loads involved with carrying the energy generating units.
  • the energy generating units are arranged at or near the ends of the load carrying structure and at opposite sides of the tower in order to balance forces and loads with respect to the tower structure.
  • the energy generating units may, e.g., be arranged at extremities of the load carrying arrangement, the extremities being arranged furthest away from the tower structure.
  • the load carrying structure is attached to the tower via a yaw arrangement whereby the load carrying structure is allowed to perform yawing movements with respect to the tower structure, thereby allowing the rotors of the energy generating units to be directed into the incoming wind.
  • Each energy generating unit thereby typically comprises a rotor, carrying a set of wind turbine blades, and a generator.
  • the energy generating unit may further comprise a gear arrangement interconnecting the rotor and the generator and a drive train.
  • the generator, and possibly the gear arrangement may be arranged inside a nacelle.
  • the wind turbine component of an energy generating unit may be any part of or the entire energy generating unit.
  • the wind turbine component may for example be the nacelle with or without parts of or the entire rotor, a wind turbine blade, a generator, drive train, gear arrangement, heat exchangers, etc.
  • the term 'tower' or 'tower structure' should be interpreted to mean a substantially vertical structure, arranged to carry the energy generating units of the multirotor wind turbine, at least partly via one or more load carrying structures. It is not ruled out that one or more energy generating units are mounted directly on the tower structure.
  • the tower may comprise a number of tower segments, which are assembled to form the tower structure. The tower segments may be assembled in a reversible manner, e.g. using screws or bolts, or in an irreversible manner, such as by means of welding or the like.
  • the tower structure may be made from concrete, and may be reinforced by means of for example by fibers in the concrete material or by wires, e.g. arranged inside the tower structure.
  • a single tower structure may have two or more load carrying structures of the kind described above mounted thereon.
  • the load carrying structures may advantageously be arranged one above the other along the length of the tower structure.
  • the method comprises positioning or dispositioning a first wind turbine component of a first energy generating unit at or near the first end of the load carrying structure.
  • the load carrying structure is yawed approximately 180 degrees, and then a second wind turbine component of a second energy generating unit is positioned or dispositioned at or near the second end of the load carrying structure opposite the first end.
  • the yawing of the load carrying structure approximately 180 degrees causes the second end of the load carrying structure to be rotated to approximately the position of the first end before the yawing.
  • the lifting, hoisting, or lowering operations are performed at the same place despite the wind turbines are positioned or dispositioned from opposite sides of the wind turbine tower and are arranged at relatively large distances apart.
  • the energy generating units may be placed in the order of 50-120 meters apart.
  • the method according to the invention advantageously provides for the wind turbine components of the multirotor wind turbine to be mounted or dismounted alternatingly on the one and the other side of the tower.
  • the unbalance of the multirotor wind turbine is reduced as compared to the situation of more wind turbine components being mounted or dismounted from the same side of the tower after each other.
  • the yawing in between the mounting or dismounting operations thus allows for more easily positioning or dispositioning the energy generating units in multiple steps (such as first a nacelle, then a hub, thereafter one blade at a time, the generator etc.), each step involving mounting a wind component of lower weight than the entire energy generating unit. This aids in reducing the unbalance of the wind turbine structure caused by one more component being installed on the one side of the tower than on the other.
  • the method according to the invention may be applied on onshore wind turbines as well as on offshore wind turbines.
  • the method comprises erecting the multirotor wind turbine and comprises erecting the tower and the load carrying structure prior to positioning the first wind turbine component.
  • the multirotor wind turbine is especially prone to be unbalanced when being erected or dismantled where more energy generating units or parts of energy generating units may be positioned on one side of the tower than on the other for some time.
  • Such unbalancing and the undesired loadings caused hereby are avoided or at least reduced by the proposed method according to the invention where the wind turbine components are positioned alternately on the first and on the second end of the load carrying structure and thereby alternately on each side of the tower.
  • the step of erecting the tower may comprise mounting a first tower segment on a foundation structure and subsequently mounting one or more further tower segments on the first tower segment, and the step of subsequently positioning the load carrying structure on the tower.
  • a further tower segment may be mounted on top of the first tower segments to extend above the load carrying structure and may be arranged either before or after positioning the load carrying structure.
  • the mounting or dismounting of the wind turbine components is part of servicing the multirotor wind turbine.
  • the advantages hereof are the same as during erecting of the multirotor wind turbine as described above.
  • the multirotor wind turbine may comprise a second load carrying structure placed at a height on the tower different from the first load carrying structure.
  • the tower may define a longitudinal axis
  • the one or more load carrying structures may extend from the tower structure along a direction substantially perpendicularly to the longitudinal axis defined by the tower structure, i.e. the load carrying structure extends away from the tower structure along a substantially horizontal direction.
  • the load carrying structure may be angled or curved, i.e. extend away from the tower along directions which are not horizontal.
  • the load carrying structure may extend away from the tower in inclined upwards directions or in an inclined downwards directions.
  • the second load carrying structure is positioned at a lower position on the tower than the first load carrying structure
  • the method comprises firstly yawing the lowermost second load carrying structures to a rotational position different from the uppermost first load carrying structure before the positioning or dispositioning of the wind turbine component at or near the end of the first load carrying structure.
  • the mounting is part of erecting the multirotor wind turbine, and the first and second wind turbine components are nacelles, the method further comprises subsequently to having mounted the first and second nacelles:
  • the rotor on the second nacelle is attached first before the rotor on the first nacelle, as the mounting of the second nacelle can then be followed by the hoisting and attachment of the rotor to the second nacelle without any yawing in between.
  • the unbalance of the wind turbine structure in the time interval from the first wind turbine component is positioned and until the corresponding second wind turbine component is positioned at the opposite side, can be reduced considerably when compared to the situation of mounting each nacelle together with its rotor.
  • wind turbine components on an additional load carrying structure may likewise be mounted and positioned with the need of a barge, crane or other hoisting equipment on only one site position and without the need for a further barge, crane or hoisting arrangement to mount the wind turbine components at the other opposite side of the tower.
  • the positioning of the wind turbine component includes hoisting the wind turbine component into position and attaching the wind turbine component to the load carrying structure.
  • the hoisting may be performed by means of a crane and/or by means of a cable attached to the load carrying structure.
  • the hoisting may be performed in any conventional way and may as an example include a hoisting arrangement arranged in or mounted on the wind turbine, temporarily or permanently.
  • the step of attaching the wind turbine component to the load carrying structure may for example comprise attaching a nacelle of the energy generating units to the load carrying structure, attaching a rotor to a nacelle already mounted on the load carrying structure, mounting and attaching a rotor blade to the hub, and/or mounting some component like for example the generator or a gear arrangement etc. in a nacelle or on the hub etc.
  • the method further comprises securing the load carrying structure against up and down tilting movements before positioning or dispositioning of the wind turbine component.
  • the load carrying structure is first secured against up and down tilting movements and next, the wind turbine component is positioned or dispositioned.
  • An energy generating unit of a modern wind turbine may weigh in the magnitude of several tons (such as in the order of 30-150 tons for a nacelle with a rotor) and be placed at a distance in the order of 20-70 meters from the tower.
  • the tower dimensions may be reduced, which reduces primarily the material costs but also the manufacturing and transportation costs of the tower.
  • the yawing arrangement can be manufactured to withstand less extreme loadings and thereby at reduced costs.
  • the securing of the load carrying structure may be performed prior to or at least simultaneously to the positioning or dispositioning of the wind turbine component.
  • the securing comprises preventing or at least in part reducing or restricting the up and down tilting movements of the load carrying structure.
  • up and down tilting movements are here understood movements of the load carrying structure from the movement of the end of the load carrying structure at least in a vertical plane. If not prevented or restricted, such movements arise from the unbalance caused by the positioning or dispositioning of the wind turbine component where the weight of the wind turbine component is added or removed from one end of the load carrying structure and thereby from one side of the tower.
  • the securing of the load carrying structure may be maintained completely or in part while positioning the dispositioning of the component. Additionally, the securing may be maintained or upheld after the positioning or dispositioning of the component has been performed for example until the balance can be partly or completely re-established. The securing may for example be maintained or upheld until the wind turbine component is replaced or until another wind turbine component of comparable weight is positioned or dispositioned at the opposite side of the wind turbine tower.
  • the way the load carrying structure is secured may be kept constant or may be changed during the positioning or dispositioning of the wind turbine component.
  • the weight of a counterweight be changed or adjusted, such as gradually increased or decreased to avoid any abrupt changes, and/or increased or decreased in steps corresponding to a wind turbine component being positioned or dispositioned in steps.
  • the securing against up and down tilting movements may be performed in different ways as discussed in more detail in the following.
  • the securing of the load carrying structure comprises attaching a counterweight near an end of the load carrying structure.
  • the counterweight is attached at or near the second end if positioning the wind turbine component at the first end, and is attached at or near the first end if dispositioning the wind turbine component at or near the first end.
  • the weight of the wind turbine component is completely or in part out-balanced by the counterweight, thereby countering the weight and the load moment from the added or removed wind turbine component.
  • the unbalance may hereby be reduced or completely avoided by simple, yet effective and in-expensive means.
  • the counterweight can be established even with restricted space available due to for example vegetation, uneven ground etc.
  • the weight of the counterweight may be chosen to be in the range of 25-125% of the weight of the wind turbine component, such as in the range of 40-100%, such as in the range of 50-75%.
  • a considerable reduction of the unbalance otherwise caused by the positioning or dispositioning of the wind turbine component is achieved without the need to know or establish the precise same weight.
  • the attaching of the counterweight in itself does not create an undesirable unbalance of the multirotor wind turbine.
  • the counterweight is relatively simple and fast to attach and can be correspondingly simply removed again when no longer needed.
  • the counterweight may be kept attached to the load carrying structure during the yawing.
  • the counterweight can act to balance the multirotor wind turbine up until the balance is re-established by the positioning or dispositioning of the second wind turbine component.
  • the counterweight may be attached to the load carrying structure for example by means of cables or ropes.
  • the counterweight may be positioned at a height just above or near the ground hanging from the load carrying structure. Hereby the counterweight need only be lifted a small amount.
  • the counterweight may be positioned at a height just below or relatively close to the load carrying structure. Thereby any potential oscillations of the hanging counterweight are kept minimal.
  • the counterweight comprises an adjustable mass. This allows for changing or adjusting the mass to improve the balancing of the multirotor wind turbine and to better match the weight of the counterweight to the weight of the wind turbine component.
  • the attaching of the counterweight comprises pumping a liquid into a ballast tank attached near the end of the load carrying structure.
  • the weight of the counterweight may be continuously or discontinuously adjusted both up and down as desired.
  • the liquid such as water, may for example be pumped up into or pumped out of a ballast tank from a tank truck.
  • the securing of the load carrying structure comprises attaching a balloon near an end of the load carrying structure.
  • the balloon is attached at the same end as the wind turbine component if positioning the wind turbine component and is attached at the opposite end if dispositioning the wind turbine component.
  • the balloon is thus attached to the same end of the load carrying structure as the wind turbine component when the component is positioned thereby countering at least in part or completely the weight hereof.
  • the balloon may be attached directly above the wind turbine component or at a different distance to the tower.
  • the balloon may comprise a gas such as Helium or propane.
  • the securing of the load carrying structure comprises attaching a compression bar between an end of the load carrying structure and a lower part of the tower.
  • the compression bar is attached such as to take up the compression forces.
  • the compression bar hereby acts to effectively carry at least a part of the weight from the wind turbine component.
  • the compression bar could, e.g., be in the form of a tube, a rod, a beam, such as an I-beam, etc.
  • the compression bar may be attached by bolts or the like fastening means and may thereby be easily removed again when no longer needed.
  • the compression bar may be attached to and rest against the tower via a ring placed around or fastened to the tower.
  • Fig. 1 is a front view of a multirotor wind turbine 101 comprising a tower structure 102 carrying two load carrying structures 103 according to an embodiment of the invention.
  • the load carrying structures 103 are arranged, one above the other, along the length of the tower structure 102.
  • Each load carrying structure 103 extending between a first end and a second end on opposite sides of the tower structure 102, as seen from the viewing angle of Fig. 1 .
  • Each load carrying structure 103 supports at least two energy generating units 105, each energy generating unit 105 comprising a nacelle 106 and a rotor 107 carrying three wind turbine blades 108.
  • the load carrying structures 103 are attached to the tower structure 102 via a yaw arrangement 111, allowing the entire load carrying structure 103 to perform yawing movements with respect to the tower structure 102 in order to direct the rotors 107 into the incoming wind.
  • the energy generating units 105 are placed symmetrically around the tower 102 so that the multirotor wind turbine 101 is balanced.
  • the method according to the invention relates to the mounting or dismounting of a wind turbine component of an energy generating unit in a way to reduce or avoid the unbalance of the multirotor wind turbine that such mounting or dismounting may otherwise cause.
  • the wind turbine component may be an energy generating unit or any part or parts hereof such as a nacelle, a rotor, a wind turbine blade, a hub, a generator, a drive train, or a gear arrangement.
  • Fig. 2 is a side view of the multirotor wind turbine 101 of Fig. 1 . It can be seen in Fig. 2 that the load carrying structures 103 in this embodiment extend from a position behind the tower structure 102 to a position in front of the tower structure 102, thereby positioning the rotors 107 of the energy generating units 105 in front of the tower structure 102, and facing the incoming wind.
  • Figs. 3A-L illustrate a method for erecting a multirotor wind turbine including the mounting of a wind turbine component according to an embodiment of the invention.
  • the tower 102 comprises at least two tower segments 301.
  • the first tower segment 301 is positioned on the foundation ( fig. 3A ) and a first load carrying structure 103 is attached to the tower ( fig. 3B ).
  • a further tower segment 301 is mounted on top of the first tower segment ( fig. 3C ) which in this embodiment is performed such that the load carrying structure 103 may be yawed around the tower 102 without any part of the tower 102 being yawed.
  • the yawing arrangement 111 is here arranged to surround the tower 102.
  • 3D illustrates the attachment of a second load carrying structure 302 at a greater height than the first load carrying height. Then a wind turbine component 300 which here is a nacelle 106 is arranged at or near a first end 310 of the load carrying structure 103 ( fig. 3E ) as indicated by arrow 305.
  • a wind turbine component 300 which here is a nacelle 106 is arranged at or near a first end 310 of the load carrying structure 103 ( fig. 3E ) as indicated by arrow 305.
  • the load carrying structure 103 is yawed approximately 180 degrees, as illustrated by arrow 344 ( fig. 3F ), and a further nacelle 106 is arranged at or near the second opposite end 320 of the load carrying structure 103 ( fig. 3G ) and as indicated by arrow 305.
  • the nacelles 106 may be hoisted into position by means of a crane or cable winches or the like.
  • the nacelles 106 on the second load carrying structure 302 are to be mounted.
  • the lower load carrying structure 103 is yawed relative to the uppermost load carrying structure 302 (as indicated by the arrows 311) such that the load carrying structures are positioned at different rotational positions ( fig. 3H ). In this way the lowermost load carrying structure is out the way for the mounting operations performed on the uppermost load carrying structure.
  • a nacelle 106 is hoisted 305 and attached to the first end 310 of the upper load carrying structure ( figure 3H ), the load carrying structure 302 is yawed approximately 180 degrees as indicated by arrow 344 in figure 3I , and the fourth nacelle 106 is hoisted into position at or near the second end 320 of the load carrying structure.
  • Figures 3J-3L illustrate the mounting and positioning of the rotors 307 of the multirotor wind turbine 101 applying the same method of yawing 344 the load carrying structure 103 in between the mounting of the wind turbine component (here the rotor 307) at opposite end of the load carrying structure 103.
  • the wind turbine components (including the nacelles) placed at the highest positions may alternatively be positioned before the wind turbine components at the lower positions.
  • Figures 4A-4D illustrate how a counterweight 333 can be attached to the second end 320 of the load carrying structure 103 before positioning a nacelle 106 at the first end 310 of the load carrying structure.
  • the counterweight 333 acts to secure the load carrying structure 103 against up and down tilting movements thereby reducing the unbalance on the multirotor wind turbine 101 and reducing considerably the loadings induced primarily in the tower 102 and the yawing arrangement 111 by the unbalance.
  • the counterweight 333 may for example have a weight of around 50% of the wind turbine component to be positioned thereby approximately halving the unbalance during the mounting operations.
  • the counterweight 333 is first attached to the second end 320, then the nacelle 106 is hoisted 305 into position and attached to the first end 310 ( figs. 4A-4C ) after which the counterweight 333 can be detached.
  • the counterweight 333 is kept attached during the yawing 344 of the load carrying structure 103 ( figure 4D ), and is then detached preferably at least partly at the same time as mounting the further nacelle 106 at the second end 320.
  • the rotors for each nacelle and any other still missing wind turbine components may be mounted in the same way as shown and described for the nacelles.
  • a counterweight may likewise be used when mounting and positioning the first two nacelles at the first lowermost load carrying structure.
  • Figs. 5 and 6 illustrate other alternative or additional methods of securing the load carrying structure against up and down tilting movements during positioning or dispositioning of a wind turbine component.
  • the load carrying structure 103 is supported at one end by a compression bar 400.
  • the compression bar 400 may be positioned as shown in figure 5 between the load carrying structure 103 and the tower 102, thereby transferring the weight from the wind turbine component down to the lower part of the tower 102 via the compression bar 400 rather than through the bearings in the yawing arrangement 111 and the upper part of the tower 102.
  • the compression bar 400 should be positioned to carry at least part of the weight at the same end as the hoisting is performed. If e.g.
  • the compression bar 400 is to be placed at the opposite end as the dispositioned nacelle thereby at least partly carrying the weight of the remaining nacelle.
  • the compression bar 400 may be fastened to the tower 102 in a ring structure (not shown) placed around the tower 102.
  • yawing 344 of the load carrying structure 103 may be performed with the compression bar 400 kept in place.
  • FIG 6 is illustrated the use of a balloon 600 to at least partly secure the load carrying structure 103 against up and down tilting movements from the positioning of the wind turbine component such as the nacelle 106.
  • the balloon 600 may be attached to the end of the load carrying structure 103 by ropes and the lifting force of the balloon 600 may be regulated and adjusted during the mounting or dismounting operations as desired.
  • the yawing 344 of the load carrying structure 103 in between the hoisting operations may be performed with the balloon 600 kept in place.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Wind Motors (AREA)

Claims (15)

  1. Procédé de montage ou de démontage d'éléments d'éolienne d'unités de génération d'énergie (105) dans une éolienne à rotors multiples (101), l'éolienne à rotors multiples (101) comprenant une tour (102) configurée pour supporter une ou plusieurs structures porteuses de charge (103, 302) s'étendant chacune entre une première extrémité et une seconde extrémité, dans lequel chaque structure porteuse de charge (103, 302) est agencée pour supporter au moins deux unités de génération d'énergie (105) agencées au niveau ou à proximité des première et seconde extrémités de la structure porteuse de charge (103, 320) et sur des côtés opposés de la tour (102), et dans lequel la structure porteuse de charge (103, 302) est fixée à la tour (102) par l'intermédiaire d'un système d'orientation (111) permettant à la structure porteuse de charge (103, 302) de s'orienter autour de la tour (102), le procédé comprenant :
    - le positionnement ou la disposition d'un premier élément d'éolienne d'une première unité de génération d'énergie (105) au niveau ou à proximité de la première extrémité de la structure porteuse de charge (103, 302) ;
    - l'orientation de la structure porteuse de charge (103, 302) à approximativement 180 degrés ;
    - le positionnement ou la disposition d'un deuxième élément d'éolienne d'une seconde unité de génération d'énergie (105) au niveau ou à proximité de la seconde extrémité de la structure porteuse de charge (103, 302) à l'opposé de la première extrémité.
  2. Procédé selon la revendication 1, dans lequel le montage fait partie de la construction de l'éolienne à rotors multiples (101) et le procédé comprend en outre le positionnement de la tour (102) et de la structure porteuse de charge (103, 302) avant de positionner le premier élément d'éolienne.
  3. Procédé selon la revendication 1, dans lequel le montage ou le démontage fait partie de l'entretien de l'éolienne à rotors multiples (101).
  4. Procédé selon l'une quelconque des revendications précédentes, dans lequel l'élément d'éolienne comprend au moins l'un parmi le groupe constitué d'une nacelle (106), d'un rotor (107, 307), d'une pale d'éolienne (108), d'un moyeu, d'un générateur, d'une chaîne d'entraînement, ou d'un système d'engrenages.
  5. Procédé selon l'une quelconque des revendications précédentes, dans lequel l'éolienne à rotors multiples (101) comprend au moins une seconde structure porteuse de charge (103, 302) en une position plus basse sur la tour (102) que la première structure porteuse de charge (103, 302), et dans lequel la seconde structure porteuse de charge la plus basse (103, 302) est tout d'abord orientée vers une position de rotation différente de la première structure porteuse de charge la plus haute (103, 302) avant le positionnement ou la disposition de l'élément d'éolienne au niveau ou à proximité de l'extrémité de la première structure porteuse de charge (103, 302).
  6. Procédé selon la revendication 2 et dans lequel les premier et deuxième éléments d'éolienne sont des nacelles (106), le procédé comprenant en outre :
    - la fixation d'au moins une partie d'un rotor (107, 307) sur l'une des première ou seconde nacelles (106) ;
    - l'orientation de la structure porteuse de charge (103, 302) à approximativement 180 degrés ; et
    - la fixation d'au moins une partie d'un second rotor (107, 307) à l'autre des première ou seconde nacelles (106).
  7. Procédé selon la revendication 6, comprenant en outre
    - le positionnement d'une seconde structure porteuse de charge (103, 302) à une hauteur différente de celle de la première structure porteuse de charge (103, 302) ;
    - l'orientation de la première structure porteuse de charge (103, 302) vers une position de rotation différente de celle de la seconde structure porteuse de charge (103, 302) ;
    - le positionnement d'un troisième élément d'éolienne au niveau ou à proximité d'une première extrémité de la seconde structure porteuse de charge (103, 302) ;
    - l'orientation de la seconde structure porteuse de charge (103, 302) à approximativement 180 degrés ; et
    - le positionnement d'un quatrième élément d'éolienne au niveau ou à proximité d'une seconde extrémité de la seconde structure porteuse de charge (103, 302) à l'opposé de la première extrémité.
  8. Procédé selon l'une quelconque des revendications précédentes, dans lequel le positionnement de l'élément d'éolienne inclut le hissage de l'élément d'éolienne en position et la fixation de l'élément d'éolienne à la structure porteuse de charge (103, 302).
  9. Procédé selon la revendication 8, dans lequel le hissage est effectué au moyen d'une grue et/ou au moyen d'un câble fixé à la structure porteuse de charge.
  10. Procédé selon l'une quelconque des revendications précédentes, comprenant en outre la protection de la structure porteuse de charge (102, 302) contre des mouvements de basculement vers le haut et vers le bas avant le positionnement ou la disposition de l'élément d'éolienne.
  11. Procédé selon la revendication 10, dans lequel la protection de la structure porteuse de charge (102, 302) comprend la fixation d'un contrepoids (333) à proximité d'une extrémité de la structure porteuse de charge (103, 302).
  12. Procédé selon la revendication 11, dans lequel le contrepoids (333) comprend une masse réglable.
  13. Procédé selon la revendication 11 ou 12, dans lequel la fixation du contrepoids (333) comprend le pompage d'un liquide dans un ballast fixé à proximité de l'extrémité de la structure porteuse de charge (102, 302).
  14. Procédé selon l'une quelconque des revendications 10 à 13, dans lequel la protection de la structure porteuse de charge (102, 302) comprend la fixation d'un ballon (600) à proximité d'une extrémité de la structure porteuse de charge (102, 302).
  15. Procédé selon l'une quelconque des revendications 10 à 14, dans lequel la protection de la structure porteuse de charge (102, 302) comprend la fixation d'une barre de compression (400) entre une extrémité de la structure porteuse de charge (102, 302) et une partie inférieure de la tour (102) pendant le positionnement ou la disposition de l'élément d'éolienne.
EP16819813.3A 2015-12-22 2016-12-15 Procédés pour monter ou démonter des éléments d'éolienne d'une éolienne à rotors multiples Active EP3394426B1 (fr)

Applications Claiming Priority (2)

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DKPA201570858 2015-12-22
PCT/DK2016/050434 WO2017108049A1 (fr) 2015-12-22 2016-12-15 Procédés pour monter ou démonter des éléments d'éolienne d'une éolienne à rotors multiples

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EP3394426B1 true EP3394426B1 (fr) 2020-05-13

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EP (1) EP3394426B1 (fr)
JP (1) JP6921086B2 (fr)
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WO (1) WO2017108049A1 (fr)

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DK3645873T3 (da) * 2017-06-27 2023-06-26 Philipp Wagner Vindmøllepark med gensidigt afstivede master
JP2019074034A (ja) * 2017-10-17 2019-05-16 三菱重工業株式会社 風力発電装置、風力発電装置の設置方法及び風力発電装置のメンテナンス方法
US20210163268A1 (en) * 2017-12-22 2021-06-03 Vestas Wind Systems A/S A method of handling a wind turbine component and a wind turbine with a crane
US10876519B1 (en) * 2019-11-06 2020-12-29 Thomas Chaapel Power generating device
CN114787502A (zh) * 2019-12-20 2022-07-22 维斯塔斯风力系统有限公司 用于阻尼位于海上的多转子风轮机移动的方法和装置
WO2022122102A1 (fr) * 2020-12-11 2022-06-16 Vestas Wind Systems A/S Libération par descente pour une nacelle dans une éolienne
CN113279901A (zh) * 2021-07-01 2021-08-20 中国华能集团清洁能源技术研究院有限公司 一种机舱带有辅助支撑结构的双风轮风电机组
CN114483458B (zh) * 2022-02-15 2024-01-30 苏州新三力风电科技有限公司 一种三机头风力发电机组及安装方法

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CN108700024B (zh) 2019-12-10
JP6921086B2 (ja) 2021-08-18
CN108700024A (zh) 2018-10-23
JP2019500540A (ja) 2019-01-10
US10934999B2 (en) 2021-03-02
WO2017108049A1 (fr) 2017-06-29
ES2792026T3 (es) 2020-11-06
EP3394426A1 (fr) 2018-10-31
US20200263668A1 (en) 2020-08-20

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